雷达接收机灵敏度测试方法

Test Method of Receiver Sensitivity for Radar

接收机灵敏度表征了雷达接收微弱信号的能力,准确测量接收灵敏度对于预估雷达作用距离有重要意义。通常接收机灵敏度是指临界接收灵敏度Simin,即接收机输出信噪比s0/n0=0 dB时的输入信号功率。然而工程中准确界定s0/n0=0 dB有其实际困难,本文分析了接收机的噪声、信号形式,总结出了一种工程中简单可行的灵敏度测试方法。

The receiver sensitivity shows the ability of receiving weak signal for Radar,and it has important significance to measure the receiver sensitivity accurately for estimating the distance of Radar effect.Generally the sensitivity of Radar receiver is to show the critical receiving sensitivity Simin,namely it is the input signal power when the ratio of signal to noise for receiver output is s0/n0=0 dB.Aimed at the puzzle of accurate definition s0/n0=0 dB in actual engineering,the paper analyzed the form of noise and signal of the receiver,and summarized a simple and feasible method of sensitivity test in the engineering.